Heel-nailing machine



April 28, 1931- J. F. STANDISH HEEL NAILING' MACHINE Filed April 1. 1929 Patented Apr. 28, 1931 JNtTE STATES PATENT Fries JOHN F. STAN DIS I, 0F HINTEROP, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY GORPQE-ATIGII, 0F PATERSCN, NEW JERSEY, A CGE-PORATION OF NEW JERSEY HEEL-NAILETG M:..CHINE Application filed April 1, 1929.

This invention relates to machines for nailing heels to the heel-seats of shoes, it particularly concerning the pressure mechanism which clamps the heels in placefor the operation upon them.

In heeling machines of the type illustrated in Letters Patent of the United States No. 1,288,521, Cosgrove, December 24, 1918, an abutment, movable vertically in the frame of the machine upon a slide, co-operates with a shoe-holding jack to press toward it the heels to be attached. From this active position, the abutment is withdrawn, in preparation for the succeeding operation, by a spring. Absolute uniformity in springs with respect to the force exerted is impossible to attain under practical manufacturing conditions, it being found that, with springs of the same dimensions, some may be sluggish in elevating the pressure-abutment, while others may act with too great force. An obj ect of the present invention is to provide for adjusting the abutment-springs while in place with but little alteration in the associated elements. For the accomplishment of this object, I combine, in a heel-nailing machine such as that above mentioned, with the known frame, the jack, the slide and its abutment and the spring joined to the slide, an adj usting member depending from the frame and connected to the spring, and means arranged tovary the vertical position of the member. By this variation, the effect of the spring upon the. abutment may be increased or diminished, so the rate of elevation may be as desired. Preferably, the adjusting member isfurnished by a rod, to which the spring is connected, it passing through a vertical opening in a plate resting upon the upper portion of the machine-frame. The rod may have means, as a nut threaded upon it, for

' adjusting it through the opening. Since the frame of the nailing machine just referred to already has at its upper portion an opening surrounded by a surface adapted to support such a plate, and as the tension of the spring acting upon the plate, as well as upon the slide and abutment, assures the retention of the plate on the frame, no machine work is necessary to adapt the former apparatus Serial No. 351,616.

and a projection from the lower surface of the plate l1m1ts this movement and guards against displacement.

In the accompanying drawing appears an illustrative embodiment of this invention,

Fig. 1 showing in partial side elevation a nailing machine to which my improvement is applied; and

Fig. 2 being a perspective view of the adjusting member and its supporting plate, taken from below.

The numeral 10 designates the frame of the well-known Alpha wood heel nailing ma chine. This frame includes a hollow column 10, upon a bracket from one side of which is supported a jack 14. This jack contains the nail-driving mechanism, the plunger of which is indicated at 16. Movable vertically in ways within the column is a slide 18 provided with an arm 20 overhanging the jack'and carrying the tread and rear pressure-abutments 22 and 24, respectively, arranged for contact with a heel l-l positioned upon the jacked shoe S. The slide is lowered, to cause the abutments to clamp the shoe, by a rod 26 connected to the treadle of the machine, this treadle not being illustrated. A hook 28 projects from the inner side of the slide 18, and to this hook is joined a spring 30, the function of which is to elevate the slide and its abutments to its normal position against a stop device 32 at the completion of the heelnailing operation.

The column 10 is manufactured with a horizontal surface 34 at its top, this surface surrounding a vertical opening through the column. Resting upon the surface 34 is a plate 86, shown as having a cross-arm 38 bridging the frame-opening between its sides, and an arm 40 extending rearwardly and there resting upon the surface 34. The plate is strengthened by webs 42 upon its upper surface and ribs 44 at its lower side. The webs and ribs converge to a common axis near the center of the plate, they generally following the directions of the arms. At their meeting point is a vertical opening 45, through which extends a rod 46 provided at its lower extremity with a hook 48 to engage the hooked upper end of the spring 30. The upper por tion of the rod is threaded and, above the plate, carries a nut and a lock-nut 50, the lower of which bears upon the meeting webs 42.

In machines of this character as they have been heretofore constructed, the upper end of the spring has been engaged by a hook projecting horizontally from the inside of the column and fixed against movement. To provide for the adjustment of the spring in accordance with this invention, it is only necessary to remove this hook from the frame, and place upon the surface 34 one of the plates 36 with its rod 46 held by the nuts 50. The rod is lowered until the hook of the spring 30 can be placed over the hook .48. Then the rod is raised by the nuts until the force exerted by the spring properly elevates the slide with its ahutments against the stop device 32, after the slide has been released at the end of the machine-cycle. Between the outer extremity of each of the ribs 4d and the adjacent wall surrounding the frame-opening is a space 52 permitting lateral movement .of the plate. As a result of this, allowance is made for irregularities in the casting of the column, and when the spring 30 is put under tension, it may adjust itself until the .pull applied to the slide 18 is substantially vertical. This reduces the liability of binding of the slide as it is moved up through its Ways by the spring. Displacement of the plate from the column before the spring is put under tension, to retain it in position, is

prevented by the contact of the ends of the ribs with the column-walls. It is to be noted that the only alteration in the machine necessary in providing this adjustment consists .of unscrewing the hook which supports the upper end of the slide-elevating spring and the placing of the plate 36, with its hook, upon the surface 34, and that, with my improved adjustment, the force of the spring may be altered, as desired, and with the advantage of a substantially automatic attainment of the correct direction of action.

Having described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a heel-nailing machine, a frame, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment coroperating with the jack, a spring joined to the slide, an adjusting member depending from the frame and connected to the spring, and means arranged to vary the vertical position of the member.

2. I11 a heel-nailing machine, a frame, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure.abutment .co-operating with the jack, a spring joined to the slide, a plate resting upon the upper portion of the frame and having a vertical opening, a rod extending through the opening and connected to the spring, and means contacting with the plate and arranged to adjust the rod through the opening.

3. In a heel-nailing machine, a frame having at its upper portion a horizontal surface surrounding an opening, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment co-o-perating with the jack, a spring joined to the slide, a plate resting upon the horizontal surface of the frame, a rod extending through the frame-opening and connected to the spring, and means arranged to support the rod for vertical adjustment upon the plate.

4. In a heel-nailing machine, a frame having at its upper portion a horizontal surface surrounding an opening, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment co-operating with the jack, a spring joined to the slide, a plate resting upon the horizontal surface of the frame and provided with an opening, a rod extending through the plate and frame-openings and connected to the spring, there being a thread upon the,

rod above the plate, and a nut engaging the rod-thread and contacting with the plate.

5. In a heel-nailing machine, a frame having at itsupper portion a horizontal surface surrounding an opening, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment co-operating with the ack, a spring joined to the slide, a plate resting upon the horizontal surface of the frame and provided with a projection extending from its lower surface into the frame-opening, said projection permitting a limited lateral movement of the plate upon the frame, and connections for the plate and spring arranged to applytenr sion to the spring and to retain said plate upon the frame.

6. Ina heel-nailing machine, a frame having at its upper portion a horizontal surface surrounding an opening, a jack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment co..-op.erating With the jack, a spring joined to the slide, a plate resting upon the horizontal surface ,of the frame, a projection from its face in which is an opening alined with the frame-opening, a threaded rod passing through the plate and frame-openings and connected to the spring, and a nut upon the rod contacting with the top of the plate;

7. In a heel-nailing machine, a frame having at its upper portion a horizontal surface surrounding an opening, a ack mounted upon the frame, a slide movable vertically in the frame and having a pressure-abutment co-operating with the jack, a spring joined to the slide, a plate resting upon the horizontal surface of the frame, said plate having Webs at its upper side and ribs at its lower side converging to a common axis, the ends of the ribs being spaced from the Walls of the frame-opening and there being a vertical opening through the plate at the meeting points of the Webs and ribs, a threaded rod passing through the plate and frame-openings and connected to the spring, and a nut upon the rod contacting With the top of the plate, the force of the spring being exerted to elevate the slide With its abutment and to hold the plate upon the frame.

In testimony whereof I have signed my name to this specification.

JOHN F. STANDISH. 

